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Trigger
thumb is a common repetitive strain injury that can
cause significant impairment in hand strength, dexterity,
and daily functioning. The condition
is characterized by pain and catching in the thumb,
and it can result in difficulty performing everyday
tasks. Although there are many organic causes
of trigger thumb, environmental factors (e.g., workplace
conditions and job demands) usually play a significant
role.
Trigger Thumb (or stenosing tenosynovitis, as it
is also known) is the result of acute trauma or a
chronic overuse injury involving the flexor tendon
that runs through the thumb. Specifically,
the flexor pollicis longus tendon develops nodules
or adhesions, which in turn leads to increased friction
as the tendon passes through the pulley system, resulting
in the swelling of the tendon and the associated
nodules. This inflammation and irritation increases
the size of the nodules or adhesions, causing the
dysfunction to greatly increase, which in turn impedes
the movement of the tendon at the metacarpophalangeal
joint. Essentially, the nodule or adhesion
on the affected tendon in the thumb gets trapped
as it passes through the pulley system which causes
the finger to lock down into the palm of the hand
as well as produces the painful catching or clicking
that is commonly associated with Trigger Thumb.
Trigger Thumb is a more common injury in women than
men, and it is more often noticed in people that
are suffering from chronic illnesses. Rheumatoid
arthritis and diabetes, for example, are common correlates
of Trigger Thumb. The reason for this seems
to be caused by the speed in which people heal from
injury, and people with chronic disorders like diabetes
and arthritis tend to heal at a much slower rate.
However, movement also plays a significant role in
the manifestation of the malady. Repetitive
movements and increased tension, stress and strain
on the hands through heavy lifting, typing, and long
hours at a steering wheel can lead to Trigger Thumb
as well.
There are numerous treatment options for reducing
the pain and impairment associated with thumb and
finger triggering. Often rest and over-the-counter
medications are enough to bring temporary relief
and possibly reduce the rate of onset due to reduced
irritation and swelling of the tissues. Individuals
looking for long-term treatment for Trigger Thumb,
however, are advised to consider appropriate stretches
and exercises that promote the integrity of the muscles
and tendons in the hand and forearm. Stretches
that help thin and lengthen the affected tendon and
exercises that increase circulation and break down
the developing adhesions and nodules, most often
formed from scar tissue, are very important. Although
surgery is the most used method of treatment, it
is far from effective. Non-invasive exercises
promoting the stretching of the flexor tendons and
strengthening the extensor tendons shows great promise
in preventing and treating this disorder.
Always consult your physician prior to making a
decision about your healthcare.
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